All the petitioners are employed at the Company's Dan River Steam Station, a power generating facility located at Draper, North Carolina. At the time this action was instituted, the Company had 95 employees at the Dan River Station, 14 of whom were Negroes; 13 of these are petitioners here.
Test Overview. An ammonia test measures the amount of ammonia in the blood. Most ammonia in the body forms when protein is broken down by bacteria in the intestines . The liver normally converts ammonia into urea, which is then eliminated in urine. Ammonia levels in the blood rise when the liver is not able to convert ammonia to urea.
Free ammonia is liberated from the sample by alkalisation, and is allowed to pass through a semiâ permeable membrane. The ammonia is measured by the change of colour of an ammonium indicator, for example the VitrosÂ® (Ortho Diagnostics Ltd) ammonia measurement utilises bromophenol blue. Bromocresol green can also be used. The change in absorbance is measured at 605 nm by reflectance spectroscopy. 2.